Report on the spruce budworm
By: by M.L. Blackman ... Investigations carried on and report published by the Maine forestry department in cooperation with the Forestry department, University of Maine, and the Maine agricultural experiment station.
Contributors: Maine Agricultural Experiment Station.; Maine. Forest Commissioner.; University of Maine Forestry Department.
Published: 1919
Place of publication: Maine
Subjects: Spruce bud-worm.